import * as Cesium from 'cesium';


class RadarChartClass {
  constructor(viewer, size) {
    this.defaultPos = [114.9358888888, 25.8458888888, 10]
    this.viewer = viewer;
    this.entity = null;
    this.size = size
  }
  addRadarScanPostStage (viewer, cartographicCenter, radius, scanColor, duration) {
    var ScanSegmentShader =
      "uniform sampler2D colorTexture;\n" +
      "uniform sampler2D depthTexture;\n" +
      "varying vec2 v_textureCoordinates;\n" +
      "uniform vec4 u_scanCenterEC;\n" +
      "uniform vec3 u_scanPlaneNormalEC;\n" +
      "uniform vec3 u_scanLineNormalEC;\n" +
      "uniform float u_radius;\n" +
      "uniform vec4 u_scanColor;\n" +
      "vec4 toEye(in vec2 uv, in float depth)\n" +
      " {\n" +
      " vec2 xy = vec2((uv.x * 2.0 - 1.0),(uv.y * 2.0 - 1.0));\n" +
      " vec4 posInCamera =czm_inverseProjection * vec4(xy, depth, 1.0);\n" +
      " posInCamera =posInCamera / posInCamera.w;\n" +
      " return posInCamera;\n" +
      " }\n" +
      "bool isPointOnLineRight(in vec3 ptOnLine, in vec3 lineNormal, in vec3 testPt)\n" +
      "{\n" +
      "vec3 v01 = testPt - ptOnLine;\n" +
      "normalize(v01);\n" +
      "vec3 temp = cross(v01, lineNormal);\n" +
      "float d = dot(temp, u_scanPlaneNormalEC);\n" +
      "return d > 0.5;\n" +
      "}\n" +
      "vec3 pointProjectOnPlane(in vec3 planeNormal, in vec3 planeOrigin, in vec3 point)\n" +
      "{\n" +
      "vec3 v01 = point -planeOrigin;\n" +
      "float d = dot(planeNormal, v01) ;\n" +
      "return (point - planeNormal * d);\n" +
      "}\n" +
      "float distancePointToLine(in vec3 ptOnLine, in vec3 lineNormal, in vec3 testPt)\n" +
      "{\n" +
      "vec3 tempPt = pointProjectOnPlane(lineNormal, ptOnLine, testPt);\n" +
      "return length(tempPt - ptOnLine);\n" +
      "}\n" +
      "float getDepth(in vec4 depth)\n" +
      "{\n" +
      "float z_window = czm_unpackDepth(depth);\n" +
      "z_window = czm_reverseLogDepth(z_window);\n" +
      "float n_range = czm_depthRange.near;\n" +
      "float f_range = czm_depthRange.far;\n" +
      "return (2.0 * z_window - n_range - f_range) / (f_range - n_range);\n" +
      "}\n" +
      "void main()\n" +
      "{\n" +
      "gl_FragColor = texture2D(colorTexture, v_textureCoordinates);\n" +
      "float depth = getDepth( texture2D(depthTexture, v_textureCoordinates));\n" +
      "vec4 viewPos = toEye(v_textureCoordinates, depth);\n" +
      "vec3 prjOnPlane = pointProjectOnPlane(u_scanPlaneNormalEC.xyz, u_scanCenterEC.xyz, viewPos.xyz);\n" +
      "float dis = length(prjOnPlane.xyz - u_scanCenterEC.xyz);\n" +
      "float twou_radius = u_radius * 2.0;\n" +
      "if(dis < u_radius)\n" +
      "{\n" +
      "float f0 = 1.0 -abs(u_radius - dis) / u_radius;\n" +
      "f0 = pow(f0, 64.0);\n" +
      "vec3 lineEndPt = vec3(u_scanCenterEC.xyz) + u_scanLineNormalEC * u_radius;\n" +
      "float f = 0.0;\n" +
      "if(isPointOnLineRight(u_scanCenterEC.xyz, u_scanLineNormalEC.xyz, prjOnPlane.xyz))\n" +
      "{\n" +
      "float dis1= length(prjOnPlane.xyz - lineEndPt);\n" +
      "f = abs(twou_radius -dis1) / twou_radius;\n" +
      "f = pow(f, 3.0);\n" +
      "}\n" +
      "gl_FragColor = mix(gl_FragColor, u_scanColor, f + f0);\n" +
      "}\n" +
      "}\n";
    var _Cartesian3Center = Cesium.Cartographic.toCartesian(cartographicCenter);
    var _Cartesian4Center = new Cesium.Cartesian4(_Cartesian3Center.x, _Cartesian3Center.y, _Cartesian3Center.z, 1);
    var _CartographicCenter1 = new Cesium.Cartographic(cartographicCenter.longitude, cartographicCenter.latitude, cartographicCenter.height + 500);
    var _Cartesian3Center1 = Cesium.Cartographic.toCartesian(_CartographicCenter1);
    var _Cartesian4Center1 = new Cesium.Cartesian4(_Cartesian3Center1.x, _Cartesian3Center1.y, _Cartesian3Center1.z, 1);
    var _CartographicCenter2 = new Cesium.Cartographic(cartographicCenter.longitude + Cesium.Math.toRadians(0.001), cartographicCenter.latitude, cartographicCenter.height);
    var _Cartesian3Center2 = Cesium.Cartographic.toCartesian(_CartographicCenter2);
    var _Cartesian4Center2 = new Cesium.Cartesian4(_Cartesian3Center2.x, _Cartesian3Center2.y, _Cartesian3Center2.z, 1);
    var _RotateQ = new Cesium.Quaternion();
    var _RotateM = new Cesium.Matrix3();
    var _time = (new Date()).getTime();
    var _scratchCartesian4Center = new Cesium.Cartesian4();
    var _scratchCartesian4Center1 = new Cesium.Cartesian4();
    var _scratchCartesian4Center2 = new Cesium.Cartesian4();
    var _scratchCartesian3Normal = new Cesium.Cartesian3();
    var _scratchCartesian3Normal1 = new Cesium.Cartesian3();
    var ScanPostStage = new Cesium.PostProcessStage({
      fragmentShader: ScanSegmentShader,
      uniforms: {
        u_scanCenterEC: function () {
          return Cesium.Matrix4.multiplyByVector(viewer.camera._viewMatrix, _Cartesian4Center, _scratchCartesian4Center);
        },
        u_scanPlaneNormalEC: function () {
          var temp = Cesium.Matrix4.multiplyByVector(viewer.camera._viewMatrix, _Cartesian4Center, _scratchCartesian4Center);
          var temp1 = Cesium.Matrix4.multiplyByVector(viewer.camera._viewMatrix, _Cartesian4Center1, _scratchCartesian4Center1);
          _scratchCartesian3Normal.x = temp1.x - temp.x;
          _scratchCartesian3Normal.y = temp1.y - temp.y;
          _scratchCartesian3Normal.z = temp1.z - temp.z;
          Cesium.Cartesian3.normalize(_scratchCartesian3Normal, _scratchCartesian3Normal);
          return _scratchCartesian3Normal;
        },
        u_radius: radius,
        u_scanLineNormalEC: function () {
          var temp = Cesium.Matrix4.multiplyByVector(viewer.camera._viewMatrix, _Cartesian4Center, _scratchCartesian4Center);
          var temp1 = Cesium.Matrix4.multiplyByVector(viewer.camera._viewMatrix, _Cartesian4Center1, _scratchCartesian4Center1);
          var temp2 = Cesium.Matrix4.multiplyByVector(viewer.camera._viewMatrix, _Cartesian4Center2, _scratchCartesian4Center2);
          _scratchCartesian3Normal.x = temp1.x - temp.x;
          _scratchCartesian3Normal.y = temp1.y - temp.y;
          _scratchCartesian3Normal.z = temp1.z - temp.z;
          Cesium.Cartesian3.normalize(_scratchCartesian3Normal, _scratchCartesian3Normal);
          _scratchCartesian3Normal1.x = temp2.x - temp.x;
          _scratchCartesian3Normal1.y = temp2.y - temp.y;
          _scratchCartesian3Normal1.z = temp2.z - temp.z;
          var tempTime = (((new Date()).getTime() - _time) % duration) / duration;
          Cesium.Quaternion.fromAxisAngle(_scratchCartesian3Normal, tempTime * Cesium.Math.PI * 2, _RotateQ);
          Cesium.Matrix3.fromQuaternion(_RotateQ, _RotateM);
          Cesium.Matrix3.multiplyByVector(_RotateM, _scratchCartesian3Normal1, _scratchCartesian3Normal1);
          Cesium.Cartesian3.normalize(_scratchCartesian3Normal1, _scratchCartesian3Normal1);
          return _scratchCartesian3Normal1;
        },
        u_scanColor: scanColor
      }
    });
    viewer.scene.postProcessStages.add(ScanPostStage);
  }
}

export default RadarChartClass;
